Improvement in means for attaching bail-ears to sheet-metal vessels



G. W. KNAPP. Means for Attaching Bail-Ear to Sheet-Metal Vessel.

No. 2:9;275. Patented Sept. 2,1879.

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GEORGE W. KNAPP, or BALTIMORE, MARYLAND, ASSIGNOR OF Two- TEIRDs HISRIGHT To JOHN G. MATTEAI- A D JAMEs E. INGRAM,

OF SAME PLACE.

IMPROVEMENT IN MEANS FOR ATTACHING BAIL-EARS I0 SHEET-METAL VESSELS.

Specification forming part of Letters Patent No. 219,275, datedSeptember 2, 1879 application 'filed July 24, 1879.

To all whom it may concern:

.Be it known that I, GEORGE W. KNAPP, of the city of Baltimore and Stateof Maryland, have invented a new and useful Improvement in AttachingEars to Sheet-Metal Vessels, of which the following is a specification.

' My invention relates to an improvement in means for attachingbail-ears to and inclosing them Within the beaded or turned-over rim ofsheet-metal vessels.

The primary object of my invention is to provide means for wiring, bymachinery, the rim of sheet-metal vessels, so that the stiffening-wiremay have formed on it bail-ears; and incidentally the object is to adaptthe said devices to attach stamped -up sheetmetal bail-ears by inclosinga part of the ear in the beaded rim.

In the accompanying drawings, Figure 1 is a side view of the dies andcombined devices for attaching the ears to the cylinder of a sheetmetalvessel. Fig. 2 is a vertical section of same in a transverse direction.Fig. 3 is an inverted plan of the upper die with its attachments. Fig.4. is a view of a wire bail-ear. Fig. 5 is a view of the blank fromwhich the vessel is formed. Fig. 6 is a side view of a vessel brokenaway at the rim to show the wire ears as attached by the apparatus. Fig.7 is a vertical transverse section of same.

In order that others may fully understand the nature of my improvementand in what it consists, I will first describe a vessel to whichbail-ears are attached by my improved apparatus. I

The letter A represents the stiffening-wire; b, the bail-ears formed bybending the wire. 0 is the blank from which the body of the vessel ismade. I

D is the edge to be turned over, and e are notches cut in this edge,through which the ears project.

The notch at each end of the blank coincides when the ends are lappedafter the cylinder is formed.

In order to accommodate the cover, the wire ears stand off laterally, asshown, and the flange of the cover will fit closely, as the turnedoverrim of the cylinder is entirely outside of the plane of its inner wall.

F represents a female die, which receives the cylinder previous to itsbeing soldered. G is the male die, whereon is an annular orcircumferential groove, h, by which the edge of the cylinder is turnedover outward. This die is provided on each of two opposite sides with aclamp, I, made to press, by means of the springs it, against the diejust above the groove h, and thus to hold the bail-ears in properposition.

In the operation of these devices thecylinder of the sheet-metal vesselis placed in the female die, with the edge to be turned projectingabove, and a Wire ear or a sheet-metal car, as the case may be, placedunder each clamp on the male die, so that the end of the bail-ear may beinclosed in the rim when the edge is turned. The two dies are thenbrought together, turning the edge of the cylinder,

and at the same time inclosing the proper part of the ears.

By means of the spring-clamps the insertion of the bail-ears in theturned-over edge is insured.

When the male die is raised the cylinder with the bail-ears attached isleft in the female die, and upon removal is ready for soldering.

Having described my invention, I claim and desire to secure by UnitedStatesLetters Patent- 1. For attaching bail-ears to cylindricalsheet-metal vessels, a die by which the sheetmetal cylinder may besustained, substantially-as described, in combinationwith. a die whereonis formed an annular or circumferential groove adapted to turn overoutward the edge of the cylinder, and which is provided with clampsadapted to hold the bail-,

ears in proper position during the operation of turning the edge, as setforth.

' 2. The combination, substantially as set forth, of a die adapted tosustain a sheetwhereby the edge of the sheet-metal eylin-l metalcylinder with its edge projecting beder is turned and the proper part ofthe bailyond the die, and a die to operate in eonneoear is secured inthe turned edge at one opertion with the die first mentioned, andadapted, at-ion.

when the two dies are brought together, to turn the projecting edge ofthe cylinder, and Witnesses: provided with a clamp to hold eachbail-ear, J NO. '1. MADDOX,

CHARLES E. LEWIS.

GEORGE W. KNAPP.

